<template>
  <div>
    <nav-bar>
      <div slot="left" @click="backClick">
        <img src="~assets/img/common/back.png" class="back" alt="返回">
      </div>
      <div class="title" slot="center">
        <div class="title-item" :class="{active:currentIndex == index}" v-for="(item,index) of titles"
           @click="titleClick(index)" :key="index">{{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
  import NavBar from "components/common/navbar/NavBar"

  export default {
    data() {
      return {
        titles:['商品','参数','评论','推荐'],
        currentIndex:0
      }
    },
    components: {
      NavBar
    },
    methods:{
      titleClick(index){
        this.currentIndex = index;
        this.$emit('titleClick',index);
      },
      backClick(){
        this.$router.back();
      }
    }
  }
</script>

<style>
  .title{
    display: flex;
    font-size: 13px;
  }
  .title-item{
    flex: 1;
  }
  .active {
    color: var(--color-high-text);
  }
  .back {
    width: 16px;
  }
</style>
